关键词: 深部找矿, 矿体地质特征, 磁法测量, 覆盖区, 找矿前景

Abstract: East Niukutou Deposit is located in the junction zone between the southwestern margin of Qaidam Basin and the northern foot of Qimantag Mountains.Its geotectonic location is in the Qinqikun orogenic system and the eastern Kunlun arc basin system.The third-order tectonic unit is the northern Kunlun magmatic arc.It belongs to the East Kunlun iron，lead，zinc，copper ，cobalt，gold，tungsten，tin and asbestos metallogenic belt with excellent metallogenic geological conditions.The Quaternary system covers a large area in the area，and there is no direct mineralization clue on the surface.In order to verify the 1∶50 000 high magnetic anomalies，firstly，the 1∶10 000 surface high-precision magnetic survey method is used to circle 13 magnetic anomalies.Secondly，combined with the characteristics of magnetic anomalies，drilling holes are laid and three-component magnetic survey is carried out in wells to preliminarily identify the anomaly source and the geological characteristics of blind ore bodies.The regional geological background，geological characteristics，ore quality and ore type are discussed in detail.At the same time，the genesis of the deposit is analyzed and the prospecting direction is discussed.The research shows that the ore bodies mainly occur in metamorphic sandstone and marble，and the ore deposit is of sedimentary metamorphic type.The magnetic characteristics of iron ore are effective and main prospecting information.The anomalies delineated in the magnetic survey results are intuitive and important prospecting indicators.Through drilling engineering verification of 1∶10 000 magnetic anomalies，it is found that all of the anomalies are direct and important prospecting indicators.There are 22 iron ore bodies and 3 ore belts，with a preliminary estimate of 4.402 million tons of iron ore.Most of the discovered ore bodies are controlled by single hole，while individual ore bodies are controlled by two boreholes.According to the discovered ore bodies and combined with the characteristics of magnetic anomalies ，boreholes are constructed beside the borehole three-component magnetic logging，which is expected to expand the scale of ore bodies and further increase the reserves of ore body resources in the area.internal resources；the intensity of some magnetic anomalies extending up to 100 m after △T-polarization becomes smaller，but their morphology basically unchanged， ndicating that the anomaly source is deep， construction of deep boreholes to verify these anomalies， there is potential for further discovery of deep orebodies.

Key words: deep prospecting, characteristics of ore bodies, magnetic measurement, coverage area, prospecting potential